Machinery for manufacturing metal tubes



2 Sheets-Sheet 1.

A.- PILKINGTON. MACHINERY FOR MANUFACTURING METAL TUBES.

(No Model.)

Patented Feb. 9, 1897 THE mm:

IS PETERS co. PHOTO-MINCE, wAsnmnrou, n, c

(No Model.) 2 SheetsSheet 2. A. PILKINGTON. MACHINERY FOR MANUFACTURING METAL TUBES.

No. 576,739. Patented Feb. 9', 1897.

UNITED STATES PATENT ()FFICE.

ARTHUR PILKINGTON, OF BIRMINGHAM, ENGLAND.

MACHINERY FOR MANUFACTURING METAL TUBES.

SPECIFICATION forming part of Letters Patent No. 576,739, dated February 9, 1897. Application filed August 24, 1896. Serial No. 608,735. (No model.) Patented in England May 16, 1895,110. 9,696.

To all whom it may concern:

Be it known that I, ARTHUR PILKINGTON, a citizen of England and a subject of Her Britannic Majesty, of Birmingham, England, have invented a new and useful Improvement in Machinery to be Employed in the Mannfacture of Metallic Tubes, (for which I have obtained a patent in England, No. 9, 696, bearing date May 16, 1895,) of which the following is a full, clear, and exact description, which will enable others skilled in the art to which it appertains to use the same.

My invention relates to machinery to be employed in the manufacture of cold-drawn metallic tubes, my object being to perform one or more of the following processes, namely, reducing, drawing, and releasing from the mandrel.

By this my present invention I may operate upon one or more tubes simultaneously.

To carry out my invention, I provide two axes carried in suitable bearings. These axes are not parallel to one another, but set so that they. apparently cross each other. Each of these axes is provided with a bulb at the center, and both revolve together.

In connection with the above I employ two other axes parallel or nearly parallel to each other, carried in suitable bearings, the center of each having a roll, bulb, or disk. One of these parallel axes is placed on each side of the bulbs on. the non -parallel axes and so near thereto that a space is left between the surfaces of the two bulbs and the surface of the roll or disk. As there is a revolving roll, bulb, or disk at each side of the pair of revolving bulbs, two spaces are thus formed, through which the tube or tubes being treated are drawn or extended, being effected by the setting up of the axes and the bulbs and the rolls or disks thereon. The bearings of all the axes run in suitable journals carried within the frames or housings, the rotary motion being given to each axis by appropriate gearing; and in order that this my said invention may be more fully understood I shall now proceed more particularly to describe the same, and for that purpose I shall refer to the several figures on the sheet of drawings hereunto annexed, the same letters of reference indicating corresponding parts throughout all the figures.

Figure 1 is a plan view of the machine or apparatus employed in the process of reducing, drawing, and releasing tubes from the mandrel and constructed according to my invention. Fig. 2 is a front view of same. Fig. 3 is a longitudinal view in section of the tube-guide. Fig. 4 is an end View of same. Fig. 5 is a sectional view of the gearing employed, taken on the line A A.

a a. are the two axes carried by the bearlugs 12 Z), and c c are their bulbs.

(l d are axes carried by the bearings.

e e and ff are their rolls, bulbs, or disks.

g g are the spaces.

h h are the tubes on the mandrels h h.

t i are the springs.

jj are the frames or housings.

G is the guide for the tubes, carried at one end by a bracket H. The guide G is provided with a flange I, which is secured to the bracket H by the bolts J. K is a similar bracket. A sleeve 7c is journaled in the brackets H and K concentric with the guide G and is provided with a driving-pulley K.

L is an internal toothed wheel in the front end of the sleeve is, and m m are toothed pinions secured on the ends of the roll-shafts Ct a and gearing into the wheel L, so that the rolls are driven in the same direction when the pulley K is revolved.

The mode of operation is as follows: WVhen the tube or tubes to be operated upon are placed in the machine at the entering end 0, Fig. 1, and reach the space or spaces 9 g,.the said tube is caught by the peculiar position of the bulbs c c to each other and the rolls, bulbs, or disks ff working therewith and thus drawn through by a revolution of the same to the guides as (Figs. 1, 3, and 4) and in a manner which causes a gradual reducing or drawing. During the operation I cause the tube or tubes to be carried upon a mandrel or mandrels, which I prefer to allow to travel through the machine.

When operating upon tubes for the releasing from the mandrels, upon which they have been drawn by the ordinary draw-bench, I employ the same essential features herein before described as being necessary when operating in reducing or drawing.

The springs 'i 2' I chiefly employ to reduce the shock to the machine or gearing.

While I have described the features of my invention and the object I have attained and shown upon the sheet of drawings, I would observe, in conclusion, that I do not limit myself to these drawings only as illustrative of my invention. I may vary the position or setting up of the axes with each other as practice may determine without departing, essentially, from the principle of my said invention.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In a tube-rolling mill, the combination, with a pair of working rolls arranged with their arms crossing a plane drawn through the axis of the work, and rigid supports for the said rolls; of driving devices operating positively to revolve the said rolls, a laterallyslidable rest-roll arranged with its axis sub- 20 stantially parallel with the axis of the Work, and springs pressing the said rest-roll toward the work, substantially as set forth.

2. In a tube-rollin g mill, the combination, with a pair of working rolls arranged with their axes crossing a plane drawn through the axis of the work, and rigid supports for the said rolls; of driving devices operating positively to revolve the said rolls, two laterallyslidable rest-rolls arranged on opposite sides of the said pair of rolls with their axes substantially parallel with the axis of the work, and springs pressing the said rest-rolls toward the work, substantially as set forth.

ARTHUR PILKINGTON.

Vitnesses:

THOMAS KENDRIOK, ALFRED KENDRICK. 

